Anything is possible with enough money...however, I am betting it is going to be a heck of a lot more expensive than just buying the $1295 package to start with, which includes 3 other worthwhile features (IMHO).

Your thread makes sense and I will try it cause the wk2 mirrors do have a nasty blind spot! old school has me using mirrors for centering me in the lanes.. I know I could learn, but is hard to teach an ole dog new tricks...
Most cars I've owned allowed me to see ole school way and had better blind spot coverage than wk2... I figured its there way of screwing us for not buying the adaptive cruise

The blind spot are in the rear bars pointing out each side and also in the mirrors.
It would be a major PIA to retrofit the OEM setup. Be cheaper trading in and getting a better spec one that has the ACC.